We often use Cadimage Detail Elements when it comes to Sections to show the suspended timber floor members, but it would take the same time to actually model them? This would keep your section live & allow you to start to get quantities & framing plans also. To do this Ive used the slab composite
There is a Complex Profile available with the Beam tool called ‘Joist Stretchy’ : It is built from 2 different Building Materials – this is so they don’t join & the X remains in the middle: It can be made any size, so may be useful in the future when you use general timber beams.
Here is a very simple technique for making effective looking Rib & Infill look correct in section First create your your slab composite, with 2 skins. set the bottom skin to show the thickness and sectional fill of your timber and the top skin to show the thickness and sectional fill of the concrete topping